number detection accuracy

[ArturSp7]

Hello,
I need to detect temperature values in thermographic video recordings. But there are many fail recognitions. It detects often 8 as 0, 2 as 0, very often 4 as 1, 1 as 4 and so on.
screenshot 2016-08-12 23 23 36

How can I adjust the detection parameters? What exactly does the script train.py do?

Thank You in advance :)